167 results about "Material hardness" patented technology

The present invention provides a multi-piece solid golf ball including a core, an intermediate layer, and a cover, in which a large number of dimples are formed on an outside surface of the cover, and a relationship between a cover material hardness and a midpoint hardness (Cm) between a core surface and a core center satisfies the following condition:midpoint hardness (Cm) between core surface and core center>cover material hardness where hardness means Shore C hardness.Further, a surface hardness of the ball is optimized, a deflection of the ball when compressed under a predetermined load is optimized, and a lift coefficient and a drag coefficient at a predetermined Reynolds number and spin rate of the dimples are set within a predetermined range.

The invention provides a high-performance nitrogen-containing hard alloy material based on a vanadium-titanium rare earth carbonitride solid solution and a preparation method of the high-performance nitrogen-containing hard alloy material, and belongs to the technical field of hard alloy cutting tool materials. Tungsten carbide of a hard phase is modified, meanwhile, the vanadium-titanium rare earth carbonitride solid solution and the boron quantum dot are introduced to modify the high-entropy alloy, through interaction of modified components, the hardness and transverse breaking strength of the hard alloy material are effectively improved, and meanwhile the phase granularity is reduced.

To provide a golf ball which reduces the distance by which an average hitter loses carry when hitting with a driver and when hitting with an iron, even if the distance by which a long hitter loses carry is increased when hitting with a driver.SOLUTION: The present invention provides a multi-piece solid golf ball including a core, an intermediate layer, and a cover, in which a large number of dimples are formed on an outside surface of the cover, and a relation between a cover material hardness and a midpoint hardness (Cm) between a core surface and a core center satisfies the following condition: midpoint hardness (Cm) between the core surface and the core center>the cover material hardness where hardness means Shore C hardness. Further, a surface hardness of the ball is optimized, a deflection of the ball when compressed under a predetermined load is optimized, and a lift coefficient and a drag coefficient at a predetermined Reynolds number and spin rate of the dimples are set within a predetermined range.SELECTED DRAWING: Figure 1

The invention provides an electroceramic material hardness determination method, an ultrasonic hardness tester and a control system thereof, the ultrasonic hardness tester is applied to electroceramic material hardness detection, and comprises a vibration rod, a pressure head and a resonance device, and the resonance device comprises a signal receiver, a signal emitter and a resonance controller; according to the ultrasonic hardness value, measured by the ultrasonic hardness meter, of the electroceramic material, the safety of the electroceramic material in the service state is accurately evaluated, so that the quality monitoring of the electroceramic material in the network access and operation inspection process is enhanced, and safe and stable operation of a power grid is practically and effectively guaranteed.

The invention belongs to the technical field of tool wear measurement, and particularly relates to a machining center tool wear state early warning method based on multi-source data fusion, and the method comprises the steps: calculating a cutting power consumption characteristic through a main shaft load energy mapping model according to the original sampling current and the real-time feeding speed of a main shaft; sliding window sampling is carried out on the cutting power consumption characteristics, and the cutting state disorder degree is calculated; performing nonlinear coupling on the power consumption gradient item and the cutting state disorder degree to obtain a grinding loss stability coefficient; and establishing a dynamic statistical reference surface, and performing cutter state early warning according to the deviation degree of the grinding loss stability coefficient monitored in real time. Instantaneous interference caused by uneven material hardness is effectively recognized and eliminated, meanwhile, signal structure disorder at the initial stage of tool failure is captured, the technical problems that in die steel machining, due to material structure segregation and variable working conditions, the false alarm rate is high, and failure precursor capturing is difficult are solved, and the machining precision is improved. And the monitoring accuracy of the precision machining process is obviously improved.

The invention relates to the technical field of helical blades, and discloses a shaftless helical blade material hardness detection device which comprises a detection cylinder, a helical blade is rotatably mounted in the detection cylinder, an equipment box is arranged at one end of the detection cylinder, a motor is arranged in the equipment box, a rotating shaft of the motor is fixedly connected with the helical blade, and a flat plate is arranged at the upper end of the detection cylinder. A detection mechanism is arranged on the flat plate and comprises a moving rod, the moving rod penetrates through the flat plate in a sliding mode, a conical block is fixedly installed at the bottom end of the moving rod, the conical block abuts against the spiral blade intermittently, during detection, the conical block abuts against the spiral blade, and if the rising height of the moving rod is higher than a normal scale line, the hardness of the spiral blade is qualified; and if the lifting height of the moving rod is lower than the normal scale line, the hardness of the helical blade is unqualified. According to the device, equipment does not need to be stopped during detection, the hardness of the spiral blade can be automatically detected, the production efficiency is high, and the labor cost is reduced.

The invention belongs to the technical field of aluminum-based composite materials, and particularly relates to a heat-resistant cyclic wear-resistant aluminum-based composite material and a preparation method thereof.Based on the total mass of the aluminum-based composite material, the heat-resistant cyclic wear-resistant aluminum-based composite material comprises an aluminum alloy matrix and a SiC particle reinforcement with the mass fraction of 15%-25%, and the SiC particle reinforcement is a mixture of micron-sized particles and submicron-sized particles; the particle size of the micron-sized particles is 10-100 [mu] m, the particle size of the submicron-sized particles is 0.3-0.8 [mu] m, the addition amount of the submicron-sized particles accounts for 0.1-2% of the total mass of the composite material, and the composite material has good wear resistance and good heat-resistant cycle performance at the normal temperature of minus 300 DEG C. The prepared SiC particle aluminum-based composite material brake disc can avoid excessive decline of material hardness, wear resistance and friction coefficient caused by thermal cycle in a repeated braking process.

The invention relates to the technical field of robot automatic manufacturing, in particular to a robot intelligent grinding and polishing machining method based on online measurement, which comprises the following steps: collecting real-time data in the robot grinding and polishing machining process through online monitoring, measuring the wear rate, monitoring the environment temperature, detecting the hardness change of a machining material, and obtaining real-time monitoring data. According to the method, key change nodes appearing in the machining process can be recognized in time by monitoring the abrasion rate, the material hardness change and real-time data of the environment temperature, the rejection rate is remarkably reduced, the production cost is reduced, the grinding and polishing path points needing to be adjusted are predicted by intelligently analyzing the trend result and combining the linear regression model, and the grinding and polishing precision is improved. The operation efficiency of the robot and the surface treatment effect of the workpiece are further optimized, through coherent treatment and feedback, the quality control of the whole grinding and polishing process is improved, and meanwhile the use efficiency of materials and the overall quality of the workpiece are greatly improved.

The invention provides a multi-zone gradient hard alloy material, and relates to the field of hard alloy materials, the multi-zone gradient hard alloy material comprises a drill tip zone, a transition zone and a drill handle zone from the outer layer to the inner layer, the drill tip zone comprises AlTiN, TiCN, ZrC, SiC-B4C composite particles, TaC and Mo2C, the transition zone comprises WC, Co, ZrC, nanoparticles, NbC and carbon nanotubes, and the drill handle zone comprises WC, Co, Ni and ZrC. Through gradient structure design, interface stress concentration in the sintering process is effectively reduced, the hardness and wear resistance of the material are improved, so that the overall crack resistance and service stability of the structure are improved, the service life of the structure is prolonged, and the material is suitable for the field of complex impact loads such as mine drilling and geological survey.

The metal material hardness detection device comprises a bottom plate, a first supporting plate is fixedly mounted at the top of the bottom plate, and two conveying belts are rotationally mounted on the two sides of the first supporting plate correspondingly; the sorting mechanism is used for separating the metal materials with the hardness reaching the standard and the metal materials with the hardness not reaching the standard through detection; the sorting mechanism comprises a second supporting plate, the second supporting plate is fixedly mounted at the top of the second supporting plate, and connecting plates are fixedly mounted on the two sides of the second supporting plate; a connecting block drives a fixing block to move, a second electric telescopic rod extends, an output shaft of a fourth motor drives a connecting rod to rotate, the connecting rod is matched with a third electric telescopic rod to enable a Leeb hardness tester to be located at the top of a metal material, and the Leeb hardness tester detects the hardness of the metal material. And qualified metal materials are carried to the top of the initial conveying belt by the fixing blocks, and unqualified metal materials are carried to the top of the other conveying belt by the fixing blocks.

The invention relates to the technical field of flexible control, in particular to an AI vision multi-mode fusion robot intelligent grinding system which comprises a track planning module, a process decision module, a three-dimensional reconstruction module, a force control compensation module and an execution control module. Generating a track fusion weight through a track fusion strategy, and performing weighted fusion to generate an anti-interference grinding path; matching a tool granularity set according to material hardness, matching a pressure parameter set according to a casting burr aspect ratio, and screening an optimal process configuration through an intersection; an initial grinding track is calculated, a dynamic force compensation amount is generated, and the grinding track is optimized through the force compensation amount; and executing casting burr root directional removal according to the optimized grinding path, the tool type and the process parameters. The technical problem that in the prior art, multi-physical-field cooperative control over the geometric characteristics of casting burrs and the characteristics of casting materials cannot be achieved is solved.

The invention provides a forming machining system of a cutting tool and the cutting tool thereof, and relates to the field of cutting machining.The forming machining system comprises a cutting feeding assembly, the cutting feeding assembly is composed of an operating mechanism, a feeding mechanism and a pressure mechanism, under the action of the pressure mechanism, the feeding amount and the maximum cutting machining force of the feeding mechanism can be limited, and the cutting machining efficiency is improved; therefore, the phenomena of tipping, breaking, damage and the like of the machining tool caused by too large feeding amount and too large cutting machining force are avoided, limiting parameters of the feeding mechanism can be freely adjusted and controlled to adapt to different machining requirements, and the problem that when an existing cutting tool feeds and cuts the outer surface of a workpiece, no feeding amount control and protection structure exists, and the machining efficiency is poor is solved. Different workpieces are different in material hardness, the feeding amount is operated completely depending on hand feeling and experience when the cutting tool is controlled to be fed, and the problems of tipping, breaking, damage and the like of the cutting tool easily occur.

The invention discloses a batch online detection method and a batch online detection system for mould base processing, and relates to the technical field of mould base processing detection, and the batch online detection method comprises the following steps: step 1, obtaining data such as the size of a processing part, cutting force, cutter temperature, cooling liquid flow and cutter vibration frequency, and material hardness parameters of a to-be-processed workpiece and used time of a cutter; and 2, calculating the cutter wear degree based on the cutting force and the cutter use time. The method comprises the steps of (1) carrying out data processing, (2) carrying out feature extraction and normalization processing on various types of data, (4) inputting the data and material hardness parameters into a classification model and predicting a processing state, and (5) dynamically adjusting a multi-station processing sequence through a contract network protocol according to a prediction result, a cooling liquid flow and a tool vibration frequency. And 6, the station adjustment information compensates and corrects the machining parameters in real time, and size deviation data are obtained. And step 7, outputting the final machining state of the machining part based on the dimensional deviation data and the machining state prediction result, and realizing efficient detection of mold frame machining.

The invention belongs to the technical field of metallurgical equipment remanufacturing, and particularly relates to a gradient functionalized high-toughness shear blade material based on double-laser melting forging time sequence coupling and a preparation method thereof. The gradient functionalized high-toughness shear blade material is prepared from the following components in percentage by mass: 0.6 percent to 0.7 percent of C, 4.5 percent to 5.5 percent of Cr, 1.8 percent to 2.2 percent of W, 1.2 percent to 1.5 percent of Mo, 0.8 percent to 1.0 percent of V, 2.8 percent to 3.2 percent of Ti, 0.008 percent to 0.015 percent of B, 0.02 percent to 0.05 percent of Ce and the balance of Fe and inevitable impurity elements. Through a three-in-one coordinated regulation and control system of gradient material design, double-laser time sequence coupling and in-situ interface strengthening, the technical bottleneck that the hardness and the toughness of a shear blade material cannot be obtained at the same time is broken through, and the problems of tipping failure, insufficient fatigue life and the like of a traditional disc shear blade material during service are solved.

The invention discloses a method and system for preparing a hard magnesium-aluminum alloy pressing cap through normal-temperature pulse, and belongs to the field of metal-based composite material preparation. The method comprises the following steps: mixing aluminum powder and magnesium oxide particles, and adding a dispersant for ball-milling treatment; applying a bipolar symmetric square-wave pulsed electric field to the mixed powder to achieve a synergistic effect with periodic pulse pressure, polarizing magnesium oxide particles by the electric field, breaking down an oxide layer and performing directional arrangement, and promoting mechanical occlusion of the particles and chemical bonding of an interface by the pressure; and the treated powder is subjected to normal-temperature static pressure forming, cleaning and polishing. The system comprises a raw material processing unit, a pulse compounding unit, a compression molding unit, a cleaning unit, a polishing unit and a control system. The method solves the problems of low interface strength, limited ceramic phase content, poor forming precision and the like of a traditional process, realizes interface chemical bonding and densification at normal temperature, improves the material hardness and structural stability, reduces energy consumption, supports large-scale production, and is suitable for preparation of complex structural members such as precise electronic shielding cases and aerospace fasteners.

Disclosed are exemplary thermal interface materials (broadly, composites) including silane coupling agents for decreasing material hardness and / or for reducing the spreading of material (s), if any, migrating therefrom. Also disclosed are exemplary methods of decreasing material hardness and / or reducing spreading of material (s), if any, migrating from composites useful for management of heat and / or electromagnetic interference (EMI). In exemplary embodiments, a composite comprises a matrix, one or more functional fillers within the matrix, and silane coupling agent within the matrix. The composite includes at least about 0.5 weight percent of the silane coupling agent based on a total weight of the composite, and / or the composite includes an amount of the silane coupling agent sufficient to decrease hardness of the composite such that the composite is configured to have a high recovery and low compression force and / or to reduce spreading of material(s), if any, migrating from the composite.

The invention relates to a method and a product for eliminating helium bubble defects in nuclear power steel, which comprises the following steps of: treating the nuclear power steel which is damaged by helium ion irradiation to generate helium bubble gathering and surface hardening by pulse current, eliminating the helium bubble defects, recovering the surface hardness of the nuclear power steel, and realizing dynamic self-repairing of irradiation damaged tissues of the nuclear power steel. The method is suitable for pulse current elimination of irradiation helium bubble defects of nuclear power steel such as austenitic stainless steel and austenite-ferrite duplex stainless steel, and is also suitable for pulse current elimination of irradiation helium bubble defects of any metal material. Experiments prove that helium bubbles induced by irradiation cause serious hardening of the surface of the material, and after the helium bubbles are eliminated through pulse current treatment, nanoindentation tests show that the hardness of the material is remarkably reduced and basically returns to the original level before irradiation. The method has the advantages of short treatment time and low energy consumption, and can effectively prolong the service life of key components such as nuclear-grade main pipelines.

The utility model relates to the technical field of strength detection, in particular to a building material hardness detection device. Comprising a frame and at least two rebound apparatuses, the frame can abut against the surface of a concrete building material, the rebound apparatuses are installed on the inner side of the frame, elastic rods are installed on the rebound apparatuses in a sliding mode, the ends of the elastic rods can abut against the surface of the concrete building material, and a positioning handle is fixedly installed on the side of the frame. A finger slot is formed in the positioning handle; the bouncing rods of the two rebound apparatuses abut against the surface of the concrete at the same time, compared with a conventional mode that a single rebound apparatus is used, relative deflection of the rebound apparatuses and the surface of the concrete can be avoided without consuming excessive force, and therefore vertical stability between the rebound apparatuses and the surface of the concrete can be easily kept; the hand fatigue degree of an operator is reduced, and the detection efficiency of the concrete material strength is improved.

The invention discloses a material hardness prediction method based on temperature gradient control, and belongs to the field of material thermal characteristic analysis. The method specifically comprises the following steps: S10, trial-manufacturing a test piece, and designing arrayed cylindrical blind holes in the bottom of the test piece; s20, a heating resistor is additionally arranged in the blind hole, and accurate temperature control over the test piece is achieved by controlling current; s30, measuring the real-time temperature of the key point of the test piece on the upper surface of the test piece by adopting temperature sensors such as PT100 and the like; s40, measuring the hardness value of the material near the corresponding temperature measuring point on the upper surface by using a hardness tester; and S50, a temperature-hardness data model is obtained through fitting by drawing a temperature and hardness curve.

The invention belongs to the technical field of alloy foil preparation, and particularly relates to a preparation method of a FeCrCoW4.5 alloy foil. Comprising the following steps that N passes of cold rolling are conducted on a FeCrCoW4.5 alloy blank, N is larger than or equal to 3, the deformation amount of each pass of cold rolling is 40-70%, annealing treatment is conducted at the temperature of 1000-1200 DEG C after the last pass, work hardening generated by cold rolling is eliminated, final cold rolling is conducted after annealing treatment till the thickness is 0.06 mm, and the alloy foil is obtained. Through multi-pass cold rolling and annealing combined machining, during cold rolling, a large number of dislocation and other defects can be generated in a material, so that the hardness of the material is increased, and the plasticity is reduced; and annealing is carried out after multi-pass cold rolling, atoms in the material can obtain certain energy, dislocation and other defects are rearranged and combined, and part of the defects are eliminated, so that the hardness of the material is reduced, certain plasticity is recovered, and the comprehensive mechanical property of the material is improved.

The present application belongs to the technical field of data processing, and particularly relates to a kind of spring forming equipment operating state monitoring and fault early warning method, its method includes: through the operating state data of key servo shaft, the torque stiffness is calculated, and the forming cycle is automatically divided into elastic contact, plastic forming and unloading demoulding phase;In the plastic forming phase, the influence of raw material hardness fluctuation is stripped by calculating the dynamic rheological resistance index of material and the upper limit of dynamic current;At the same time, the energy topology consistency coefficient containing position weighting function is calculated to capture the slight waveform distortion;Finally, a comprehensive fault early warning index is constructed based on the above index, and the equipment is warned or stopped in stages.The present application can effectively decouple material attribute fluctuation and mechanical failure, and improve the detection sensitivity of early failure.

The invention relates to the technical field of material hardness detection, in particular to a special detection tool for hard alloy holding-up hammer hardness detection, which comprises a detector, and the detector comprises a lifting platform for placing a holding-up hammer; the special detecting tool for detecting the hardness of the hard alloy holding-up hammer further comprises a bearing unit, the bearing unit is arranged on the lifting table and comprises a supporting piece arranged above the lifting table, and a bearing part used for placing the holding-up hammer is installed on the supporting piece. The leveling unit is matched with the bearing unit, it can be ensured that the leveling lower pressing plate in the leveling unit is attached to the detected face of the holding-up hammer, then it is ensured that the detected face of the holding-up hammer is in the horizontal state, a clamp does not need to be manually adjusted in advance, and the working efficiency is improved. The change from the mode that the clamp actively controls the levelness of the holding-up hammer detection face to the mode that the clamp is attached to the horizontal detection face in a self-adaptive mode is achieved, and the risk of levelness deviation caused by clamp abrasion is avoided.

The invention discloses a bending control method and system for steel structure production, and relates to the field of metal processing. The method comprises the following steps: receiving steel structure bending request information of a user side; extracting material hardness, material extension parameters and steel thickness in the bending direction; the interactive bending assembly is used for receiving the initial bending control parameters; generating a k factor prediction value through a k factor prediction module; when the k factor prediction value does not meet a k factor threshold value, optimization is carried out through a bending optimization module; and the steel to be bent is pushed to enter the bending die lower die, and when the expected bending position is met, the bending die upper die is controlled to conduct stamping and bending. The technical problems that the reliability of the calculation result of an empirical formula is poor and bending control is inaccurate due to the fact that the k factor is directly calculated in a traditional mode but the influence factors of the k factor are complex and diverse are solved, and the technical effects that the accuracy of the k factor is ensured and the bending process is accurately controlled are achieved by adopting an advanced control algorithm and a sensor technology.

The utility model belongs to the technical field of metal material hardness detection, and particularly relates to a metal material hardness detection device which comprises a working table, a limiting groove is formed in the top face of the working table, through grooves communicated with the limiting groove are symmetrically formed in the working table, U-shaped fixing rods are installed in the through grooves in a sliding mode, and a sliding plate is installed in the limiting groove in a sliding mode. The supporting frame is installed on the top of the workbench in a sliding mode, a hydraulic cylinder is installed in the supporting frame and located above the sliding plate in a sliding mode, and a detector is fixedly installed at the output end of the hydraulic cylinder; the driving assembly is located in the workbench and used for driving the two U-shaped fixing rods to ascend or descend. When the whole device is used, not only can rectangular metal materials be fixed, but also tubular metal materials can be fixed, the tubular metal materials can be prevented from shaking, and the tubular metal materials can be fixed more stably.

The present invention discloses a method for spin forming an elevator return pulley, which relates to the technical field of elevator part processing. The method includes designing a spin forming process, designing a spin blank, designing a spin forming process, spin forming, and inspecting parts. The spin forming process sequentially includes designing a spin forming die, designing the attack angle and profile of the spinning wheel, designing the clearance line of the spinning wheel, designing the spin forming trajectory, generating a spin forming program, and designing spin forming parameters. The spin forming sequentially includes spin forming the small end, spin forming the large end, and eccentric spin forming the rope groove structure. This application can overcome the disadvantages of casting processing technology and welding technology, and can greatly shorten the processing cycle, improve the processing efficiency. Moreover, spin forming can harden the material and improve the hardness of the material. Through conventional spin forming and eccentric spin forming, the material hardness is increased from HB180 to HB310, greatly improving the strength of the material and enhancing the safety of the product. Under the same strength requirements, spin forming can meet the requirements of product lightweight design.

A non-ferrous metal rolling and trimming device belongs to the field of non-ferrous metal shearing technology. The invention includes a body with a top frame fixedly connected to its top. The top frame contains a trimming buffer mechanism, and the bottom of the inner wall of the top frame has a downward locking mechanism. The downward locking mechanism includes a mounting rod connected at its top to the bottom of the inner wall of the top frame. The mounting rod is connected to a limiting rod via a pressure limiting mechanism. A through groove is formed in the side wall of the mounting rod, allowing it to slide along the outer wall of the fixed rod via a sliding plate. This extends the contact time between the cutter and the hard area, reducing rigid impact cutting to a buffered cutting method. This avoids changes in cutting stress due to fluctuations in material hardness, preventing edge instability. It also extends the service life of the trimming saw and avoids rigid hard impact during cutting. The burr height and crack incidence at the trimming edge are significantly reduced, improving the flatness and smoothness of the trimmed edge.

The utility model relates to the technical field of PDC drill bits, and discloses an anti-impact PDC drill bit which comprises a PDC drill bit body, a spraying mechanism is arranged in the PDC drill bit body, an anti-impact mechanism is arranged at the upper end of the PDC drill bit body, and the upper end of the anti-impact mechanism is fixedly connected with a connecting block. The anti-impact mechanism comprises an anti-impact base, an outer protection ring, a connecting column, a sliding block, a spring, a supporting column and a sliding groove, when impact force impacts the drill bit, due to the fact that the material hardness of the supporting column is lower than that of the drill bit, the supporting column can be broken due to the impact force, and therefore no support exists between the connecting column and the anti-impact base; and meanwhile, the impact force is slowly released through the spring, so that the effect of protecting the drill bit is achieved, and the impact resistance effect of the device is effectively improved.

The present invention discloses an intelligent stamping die which automatically adjusts the stamping intensity based on the hardness of the material, and belongs to the field of metal processing technology. The stamping die comprises a stamping frame, an upper die is provided on the stamping frame, a stamping hydraulic rod is provided on the stamping frame, two ends of the stamping hydraulic rod are respectively connected to the stamping frame and the upper end face of the upper die, a lower die is provided on the stamping frame, a plurality of supporting slides are provided on the lower die, the supporting slides pass through the upper die and are slidably connected to the upper die, a breaking ring is provided on the lower die, an anti-slip component is provided on the lower die, a stamping track is provided on the upper die, a stamping column is provided in the stamping track, a plurality of fixed handles are provided on the upper die, a detection pillar is provided on the stamping column, the detection pillar is slidably connected to the stamping column, a detection spring is provided between the detection pillar and the stamping column, and two ends of the detection spring respectively press against the upper die and the detection pillar. The present invention has the function of automatically adjusting the stamping effect according to the hardness of the metal plate.

The utility model relates to the technical field of detection equipment, and discloses material hardness detection equipment for construction engineering, which comprises a working table, supporting legs are fixedly connected to the bottom of the working table, detection equipment is fixedly connected to the top of the working table, a hydraulic rod is fixedly connected to the bottom of the detection equipment, and a mounting mechanism is arranged at the bottom of the hydraulic rod. A fixing mechanism is arranged on the outer side of the mounting mechanism, the mounting mechanism comprises a steel ball assembly and a clamping assembly, the steel ball assembly is arranged at the bottom of the hydraulic rod, and the clamping assembly is arranged in the steel ball assembly. According to the material hardness detection equipment for the construction engineering, through the arrangement of the mounting mechanism, a detection steel ball is clamped in the bottom of a mounting sleeve through a rectangular rod and a positioning clamping barrel, so that a worker only needs to adjust the position of a positioning rod to complete the disassembly and assembly of the detection steel ball, and the detection steel ball is not damaged after being used for a long time; workers can quickly complete replacement, operation is easy, and use of the workers is facilitated.